This was on Teleread blog which comes from the Kindle blog... but it seems that it is worth repeating here:

Join other Kindle owners who have unlocked the pleasures to Kindle ownership by reading Stephen Windwalker’s premier guide for Kindle owners; and as a way of thanking the Kindle community, you can download The Complete User’s Guideto the Amazing Amazon Kindle FOR FREE through October 18th, compliments of the author. Written for serious readers as well as early adopters and “gadget heads”, Windwalker’s guide was the first full-length book about the Kindle for Kindle users. In it you’ll find tips on everything from taking notes on Kindle, to accessing Wikipedia more quickly and smoothly, to how to publish a Kindle edition of your own book or document, and much, much more.

Yep. Isn't Kindle nice. I grabbed this the other day on line. Just now I flipped on my Kindles wireless and the book showed up in about 30seconds... and then I turned off the wireless. That is faster than hooking it to the PC, waiting for it to mount, coping a file to it... unmounting it.

Ummm... it's still 18 October by my calendar, but the book is priced at $2.39 at Amazon. Wonder if they gave away too many books?

Update: I fired up the antenna on my Kindle and loaded the "Kindle Daily Post" (which I haven't found any way to access except directly from the Kindle) and it says, "FOR FREE through October 17th". Given that this message is dated October 16 @ 8:01 AM PDT, that's not a very long window of opportunity.